21552294880 has 48 divisors (see below), whose sum is σ = 52101436464. Its totient is φ = 8420428800.

The previous prime is 21552294857. The next prime is 21552294893. The reversal of 21552294880 is 8849225512.

It is a self number, because there is not a number n which added to its sum of digits gives 21552294880.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559421 + ... + 1573180.

It is an arithmetic number, because the mean of its divisors is an integer number (1085446593).

Almost surely, 2^21552294880 is an apocalyptic number.

21552294880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21552294880 is an abundant number, since it is smaller than the sum of its proper divisors (30549141584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21552294880 is a wasteful number, since it uses less digits than its factorization.

21552294880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132659 (or 3132651 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 21552294880 in words is "twenty-one billion, five hundred fifty-two million, two hundred ninety-four thousand, eight hundred eighty".